diff --git Python-2.6.4/Lib/distutils/command/build_ext.py Python-2.6.4/Lib/distutils/command/build_ext.py

--- Python-2.6.4/Lib/distutils/command/build_ext.py

+++ Python-2.6.4/Lib/distutils/command/build_ext.py

@@ -636,6 +636,8 @@

         modpath = fullname.split('.')

         filename = self.get_ext_filename(ext_name)

         filename = os.path.split(filename)[-1]

+        if sys.maxint != 2147483647L:

+            filename = os.path.join("64", filename)

         if not self.inplace:

             # no further work needed

@@ -677,7 +679,13 @@

         so_ext = get_config_var('SO')

         if os.name == 'nt' and self.debug:

             return os.path.join(*ext_path) + '_d' + so_ext

-        return os.path.join(*ext_path) + so_ext

+	# .so extensions are word-size specific

+        path = apply(os.path.join, ext_path)

+        if sys.maxint == 2147483647L:

+            return path + so_ext

+        dirname = os.path.dirname(path);

+        basename = os.path.basename(path);

+        return os.path.join(dirname, "64", basename + so_ext)

     def get_export_symbols (self, ext):

         """Return the list of symbols that a shared extension has to

diff --git Python-2.6.4/Makefile.pre.in Python-2.6.4/Makefile.pre.in

--- Python-2.6.4/Makefile.pre.in

+++ Python-2.6.4/Makefile.pre.in

@@ -94,11 +94,11 @@

 SCRIPTDIR=	$(prefix)/lib

 # Detailed destination directories

-BINLIBDEST=	$(LIBDIR)/python$(VERSION)

-LIBDEST=	$(SCRIPTDIR)/python$(VERSION)

-INCLUDEPY=	$(INCLUDEDIR)/python$(VERSION)

-CONFINCLUDEPY=	$(CONFINCLUDEDIR)/python$(VERSION)

-LIBP=		$(LIBDIR)/python$(VERSION)

+BINLIBDEST=		$(exec_prefix)/lib/python$(VERSION)

+LIBDEST=		$(SCRIPTDIR)/python$(VERSION)

+INCLUDEPY=		$(INCLUDEDIR)/python$(VERSION)

+CONFINCLUDEPY=		$(CONFINCLUDEDIR)/python$(VERSION)

+LIBP=			$(exec_prefix)/lib/python$(VERSION)

 # Symbols used for using shared libraries

 SO=		@SO@

diff --git Python-2.6.4/Python/import.c Python-2.6.4/Python/import.c

--- Python-2.6.4/Python/import.c

+++ Python-2.6.4/Python/import.c

@@ -1193,6 +1193,57 @@

 static int find_init_module(char *); /* Forward */

 static struct filedescr importhookdescr = {"", "", IMP_HOOK};

+#ifdef HAVE_STAT

+static char *

+insert_64dir(char *buf, size_t buflen)

+{

+	char *base;

+	char *cp;

+	size_t blen;

+

+	if ((blen = strlen(buf)) == 0)

+		return (NULL);

+

+	cp = &buf[blen - 1];

+	while (cp != buf && *cp != SEP)

+		cp--;

+

+	if (cp != buf)

+		cp++;

+

+	if (blen + strlen("64/") + 1 >= buflen)

+		return NULL;

+

+	base = strdup(cp);

+	sprintf(cp, "64%c%s", SEP, base);

+	free(base);

+

+	return buf;

+}

+

+/*

+ * If we're on a 64-bit platform, modify lookups for shared object files.

+ */

+static size_t modify_path(struct filedescr *fdp, char *buf, size_t buflen)

+{

+	struct stat statbuf;

+

+	if (sizeof(void *) != 8)

+		return 0;

+

+	if (stat(buf, &statbuf) == 0 && S_ISDIR(statbuf.st_mode))

+		return 0;

+

+	if (fdp->type != C_EXTENSION)

+		return 0;

+

+	if (insert_64dir(buf, buflen) == NULL)

+		return 0;

+

+	return strlen("64/");

+}

+#endif

+

 static struct filedescr *

 find_module(char *fullname, char *subname, PyObject *path, char *buf,

             size_t buflen, FILE **p_fp, PyObject **p_loader)

@@ -1210,11 +1261,10 @@

     static struct filedescr fd_builtin = {"", "", C_BUILTIN};

     static struct filedescr fd_package = {"", "", PKG_DIRECTORY};

     char name[MAXPATHLEN+1];

-#if defined(PYOS_OS2)

     size_t saved_len;

     size_t saved_namelen;

     char *saved_buf = NULL;

-#endif

+

     if (p_loader != NULL)

         *p_loader = NULL;

@@ -1433,15 +1483,18 @@

         }

 #endif

 #endif

-#if defined(PYOS_OS2)

+

         /* take a snapshot of the module spec for restoration

          * after the 8 character DLL hackery

          */

         saved_buf = strdup(buf);

         saved_len = len;

         saved_namelen = namelen;

-#endif /* PYOS_OS2 */

+

         for (fdp = _PyImport_Filetab; fdp->suffix != NULL; fdp++) {

+#ifdef HAVE_STAT

+            len += modify_path(fdp, buf, buflen);

+#endif

 #if defined(PYOS_OS2) && defined(HAVE_DYNAMIC_LOADING)

             /* OS/2 limits DLLs to 8 character names (w/o

                extension)

@@ -1482,21 +1535,18 @@

                     fp = NULL;

                 }

             }

-#if defined(PYOS_OS2)

+

             /* restore the saved snapshot */

             strcpy(buf, saved_buf);

             len = saved_len;

             namelen = saved_namelen;

-#endif

         }

-#if defined(PYOS_OS2)

         /* don't need/want the module name snapshot anymore */

         if (saved_buf)

         {

             free(saved_buf);

             saved_buf = NULL;

         }

-#endif

         Py_XDECREF(copy);

         if (fp != NULL)

             break;

diff --git Python-2.6.4/Python/importdl.h Python-2.6.4/Python/importdl.h

--- Python-2.6.4/Python/importdl.h

+++ Python-2.6.4/Python/importdl.h

@@ -31,8 +31,9 @@

 extern PyObject *_PyImport_LoadDynamicModule(char *name, char *pathname,

 					     FILE *);

-/* Max length of module suffix searched for -- accommodates "module.slb" */

-#define MAXSUFFIXSIZE 12

+/* Max length of module suffix searched for -- accommodates "module.slb"

+   and "64/" */

+#define MAXSUFFIXSIZE 15

 #ifdef MS_WINDOWS

 #include <windows.h>

diff --git Python-2.6.4/configure.in Python-2.6.4/configure.in

--- Python-2.6.4/configure.in

+++ Python-2.6.4/configure.in

@@ -17,8 +17,44 @@

 AH_TOP([

 #ifndef Py_PYCONFIG_H

 #define Py_PYCONFIG_H

+

 ])

 AH_BOTTOM([

+

+#include <sys/isa_defs.h>

+

+/*

+ * Python originally defined these statically, which prevents a 32-64 python

+ * from working at all.

+ */

+

+#define SIZEOF_SHORT 2

+#define SIZEOF_INT 4

+#define SIZEOF_LONG_LONG 8

+#define SIZEOF_FPOS_T 8

+#define SIZEOF_OFF_T 8

+#define SIZEOF_PTHREAD_T 4

+

+#ifdef _LP64

+#define SIZEOF_LONG 8

+#define SIZEOF_UINTPTR_T 8

+#define SIZEOF_VOID_P 8

+#define SIZEOF_TIME_T 8

+#define SIZEOF_SIZE_T 8

+#define SIZEOF_LONG_DOUBLE 16

+#else

+#define SIZEOF_LONG 4

+#define SIZEOF_UINTPTR_T 4

+#define SIZEOF_VOID_P 4

+#define SIZEOF_TIME_T 4

+#define SIZEOF_SIZE_T 4

+#if defined(__i386)

+#define SIZEOF_LONG_DOUBLE 12

+#else

+#define SIZEOF_LONG_DOUBLE 16

+#endif

+#endif

+

 /* Define the macros needed if on a UnixWare 7.x system. */

 #if defined(__USLC__) && defined(__SCO_VERSION__)

 #define STRICT_SYSV_CURSES /* Don't use ncurses extensions */

@@ -65,6 +101,26 @@

 define_xopen_source=yes

+# AC_CHECK_SIZEOF without the AC_DEFINE_UNQUOTED

+AC_DEFUN([PY_CHECK_SIZEOF],

+[AS_LITERAL_IF([$1], [],

+               [AC_FATAL([$0: requires literal arguments])])dnl

+AC_CHECK_TYPE([$1], [], [], [$3])

+AC_CACHE_CHECK([size of $1], AS_TR_SH([ac_cv_sizeof_$1]),

+[if test "$AS_TR_SH([ac_cv_type_$1])" = yes; then

+  # The cast to unsigned long works around a bug in the HP C Compiler

+  # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects

+  # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.

+  # This bug is HP SR number 8606223364.

+  _AC_COMPUTE_INT([(long) (sizeof ($1))],

+                  [AS_TR_SH([ac_cv_sizeof_$1])],

+                  [AC_INCLUDES_DEFAULT([$3])],

+                  [AC_MSG_FAILURE([cannot compute sizeof ($1), 77])])

+else

+  AS_TR_SH([ac_cv_sizeof_$1])=0

+fi])dnl

+])# PY_CHECK_SIZEOF

+

 # Arguments passed to configure.

 AC_SUBST(CONFIG_ARGS)

 CONFIG_ARGS="$ac_configure_args"

@@ -1436,14 +1492,10 @@

 # Sizes of various common basic types

 # ANSI C requires sizeof(char) == 1, so no need to check it

-AC_CHECK_SIZEOF(int, 4)

-AC_CHECK_SIZEOF(long, 4)

-AC_CHECK_SIZEOF(void *, 4)

 AC_CHECK_SIZEOF(short, 2)

 AC_CHECK_SIZEOF(float, 4)

 AC_CHECK_SIZEOF(double, 8)

-AC_CHECK_SIZEOF(fpos_t, 4)

-AC_CHECK_SIZEOF(size_t, 4)

+AC_CHECK_SIZEOF(short)

 AC_CHECK_SIZEOF(pid_t, 4)

 AC_MSG_CHECKING(for long long support)

@@ -1453,9 +1505,6 @@

   have_long_long=yes

 ])

 AC_MSG_RESULT($have_long_long)

-if test "$have_long_long" = yes ; then

-AC_CHECK_SIZEOF(long long, 8)

-fi

 AC_MSG_CHECKING(for long double support)

 have_long_double=no

@@ -1463,10 +1512,6 @@

   AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define this if you have the type long double.])

   have_long_double=yes

 ])

-AC_MSG_RESULT($have_long_double)

-if test "$have_long_double" = yes ; then

-AC_CHECK_SIZEOF(long double, 12)

-fi

 AC_MSG_CHECKING(for _Bool support)

 have_c99_bool=no

@@ -1480,106 +1525,25 @@

 fi

 AC_CHECK_TYPES(uintptr_t, 

-   [AC_CHECK_SIZEOF(uintptr_t, 4)], 

+   [],

    [], [#ifdef HAVE_STDINT_H

         #include <stdint.h>

         #endif])

-# Hmph. AC_CHECK_SIZEOF() doesn't include <sys/types.h>.

-AC_MSG_CHECKING(size of off_t)

-AC_CACHE_VAL(ac_cv_sizeof_off_t,

-[AC_TRY_RUN([#include <stdio.h>

+PY_CHECK_SIZEOF(off_t,4,[

+#include <stdio.h>

+#include <stdlib.h>

 #include <sys/types.h>

-main()

-{

-  FILE *f=fopen("conftestval", "w");

-  if (!f) exit(1);

-  fprintf(f, "%d\n", sizeof(off_t));

-  exit(0);

-}],

-ac_cv_sizeof_off_t=`cat conftestval`,

-ac_cv_sizeof_off_t=0,

-ac_cv_sizeof_off_t=4)

-])

-AC_MSG_RESULT($ac_cv_sizeof_off_t)

-AC_DEFINE_UNQUOTED(SIZEOF_OFF_T, $ac_cv_sizeof_off_t,

-[The number of bytes in an off_t.])

-

-AC_MSG_CHECKING(whether to enable large file support)

-if test "$have_long_long" = yes

-then

-if test "$ac_cv_sizeof_off_t" -gt "$ac_cv_sizeof_long" -a \

-	"$ac_cv_sizeof_long_long" -ge "$ac_cv_sizeof_off_t"; then

-  AC_DEFINE(HAVE_LARGEFILE_SUPPORT, 1, 

-  [Defined to enable large file support when an off_t is bigger than a long

-   and long long is available and at least as big as an off_t. You may need

-   to add some flags for configuration and compilation to enable this mode.

-   (For Solaris and Linux, the necessary defines are already defined.)])

-  AC_MSG_RESULT(yes)

-else

-  AC_MSG_RESULT(no)

-fi

-else

-  AC_MSG_RESULT(no)

-fi

-

-# AC_CHECK_SIZEOF() doesn't include <time.h>.

-AC_MSG_CHECKING(size of time_t)

-AC_CACHE_VAL(ac_cv_sizeof_time_t,

-[AC_TRY_RUN([#include <stdio.h>

-#include <time.h>

-main()

-{

-  FILE *f=fopen("conftestval", "w");

-  if (!f) exit(1);

-  fprintf(f, "%d\n", sizeof(time_t));

-  exit(0);

-}],

-ac_cv_sizeof_time_t=`cat conftestval`,

-ac_cv_sizeof_time_t=0,

-ac_cv_sizeof_time_t=4)

 ])

-AC_MSG_RESULT($ac_cv_sizeof_time_t)

-AC_DEFINE_UNQUOTED(SIZEOF_TIME_T, $ac_cv_sizeof_time_t, 

-[The number of bytes in a time_t.])

-

-# if have pthread_t then define SIZEOF_PTHREAD_T

-ac_save_cc="$CC"

-if test "$ac_cv_kpthread" = "yes"

-then CC="$CC -Kpthread"

-elif test "$ac_cv_kthread" = "yes"

-then CC="$CC -Kthread"

-elif test "$ac_cv_pthread" = "yes"

-then CC="$CC -pthread"

-fi

-AC_MSG_CHECKING(for pthread_t)

-have_pthread_t=no

-AC_TRY_COMPILE([#include <pthread.h>], [pthread_t x; x = *(pthread_t*)0;], have_pthread_t=yes)

-AC_MSG_RESULT($have_pthread_t)

-if test "$have_pthread_t" = yes ; then

-  # AC_CHECK_SIZEOF() doesn't include <pthread.h>.

-  AC_MSG_CHECKING(size of pthread_t)

-  AC_CACHE_VAL(ac_cv_sizeof_pthread_t,

-  [AC_TRY_RUN([#include <stdio.h>

-#include <pthread.h>

-  main()

-  {

-    FILE *f=fopen("conftestval", "w");

-    if (!f) exit(1);

-    fprintf(f, "%d\n", sizeof(pthread_t));

-    exit(0);

-  }],

-  ac_cv_sizeof_pthread_t=`cat conftestval`,

-  ac_cv_sizeof_pthread_t=0,

-  ac_cv_sizeof_pthread_t=4)

-  ])

-  AC_MSG_RESULT($ac_cv_sizeof_pthread_t)

-  AC_DEFINE_UNQUOTED(SIZEOF_PTHREAD_T, $ac_cv_sizeof_pthread_t,

-   [The number of bytes in a pthread_t.])

-fi

-CC="$ac_save_cc"

+AC_MSG_CHECKING(whether to enable large file support)

+AC_DEFINE(HAVE_LARGEFILE_SUPPORT, 1,

+[Defined to enable large file support when an off_t is bigger than a long

+ and long long is available and at least as big as an off_t. You may need

+ to add some flags for configuration and compilation to enable this mode.

+ (For Solaris and Linux, the necessary defines are already defined.)])

+AC_MSG_RESULT(yes)

 AC_MSG_CHECKING(for --enable-toolbox-glue)

 AC_ARG_ENABLE(toolbox-glue,

@@ -1873,12 +1837,6 @@

 if test -z "$CCSHARED"

 then

 	case $ac_sys_system/$ac_sys_release in

-	SunOS*) if test "$GCC" = yes;

-		then CCSHARED="-fPIC";

-		elif test `uname -p` = sparc;

-		then CCSHARED="-xcode=pic32";

-		else CCSHARED="-Kpic";

-		fi;;

 	hp*|HP*) if test "$GCC" = yes;

 		 then CCSHARED="-fPIC";

 		 else CCSHARED="+z";

@@ -3383,12 +3341,6 @@

 wchar_h="no"

 )

-# determine wchar_t size

-if test "$wchar_h" = yes

-then

-  AC_CHECK_SIZEOF(wchar_t, 4, [#include <wchar.h>])

-fi

-

 AC_MSG_CHECKING(for UCS-4 tcl)

 have_ucs4_tcl=no

 AC_TRY_COMPILE([

@@ -3419,6 +3371,11 @@

   ac_cv_wchar_t_signed=no,

   ac_cv_wchar_t_signed=yes)])

   AC_MSG_RESULT($ac_cv_wchar_t_signed)

+ 

+  PY_CHECK_SIZEOF(wchar_t, 4, [

+  #include <wchar.h>

+  ])

 fi

 AC_MSG_CHECKING(what type to use for unicode)